Senior .NET Developer – Platform Modernization

About the role

We are looking for a highly skilled Senior .NET Software Developer to join our engineering team in Centurion. You will maintain and enhance Excalibur4, a large‑scale enterprise debt collection platform, while driving its transformation to a modern micro‑services architecture.

Key responsibilities

• Design, develop, and maintain robust C# web applications using MVC and a strict multi‑tier architecture.
• Create and secure RESTful APIs that support internal workflows and third‑party integrations.
• Optimize MS SQL Server schemas, stored procedures, and complex queries.
• Collaborate on the decomposition of the monolithic system into .NET 10 micro‑services hosted on Linux Docker containers.
• Manage source control, branching strategies, and CI pipelines in GitHub.
• Support IIS deployment environments while planning the migration to containerized Linux hosts.
• Lead code reviews, enforce SOLID principles, and mentor junior developers.

Required profile

• Minimum 5 years of professional experience developing enterprise .NET applications.
• Strong understanding of layered architecture and data traceability.
• Team‑player who values architectural integrity and pragmatic problem‑solving.
• Experience working in a monolithic environment and transitioning to micro‑services.

Required skills

• .NET Framework 4.8
• C#
• ASP.NET MVC
• MS SQL Server
• Docker
• GitHub
• IIS
• Linux
• RESTful API design
• SOLID principles